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ANDROID: mm: Optimizing memhealth driver

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Introduced new counter, to keep track of the size of
`new_oom_victims_count`, in order to stop utilizing
`list_count_nodes()`.

Bug: 244232958
Change-Id: I165b90add4d9d32d863f66da184dac884e81c2dd
Signed-off-by: Carlos Galo <carlosgalo@google.com>
This commit is contained in:
Carlos Galo
2023-09-18 17:30:56 +00:00
parent af240f467f
commit 72d355a5fe
1 changed files with 6 additions and 2 deletions
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drivers/android/memhealth.c
+6 -2
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@@ -36,7 +36,8 @@ static size_t oom_victim_removed_count;
static DEFINE_MUTEX(memhealth_mutex);
/* List of new oom victims not yet added into oom_victim_list */
static struct list_head new_oom_victims_list;
/* Lock protecting new_oom_victims_list */
static size_t new_oom_victims_count;
/* Lock protecting new_oom_victims_list and new_oom_victims_count */
static DEFINE_SPINLOCK(memhealth_spin_lock);
struct oom_victim {
@@ -64,8 +65,9 @@ static void oom_list_move_victims(struct work_struct *work)
return;
}
total_new_nodes = list_count_nodes(&new_oom_victims_list);
total_new_nodes = new_oom_victims_count;
list_splice_tail_init(&new_oom_victims_list, &oom_victim_list);
new_oom_victims_count = 0;
spin_unlock(&memhealth_spin_lock);
@@ -143,6 +145,7 @@ static int add_oom_victim_to_list(pid_t pid, ktime_t timestamp)
* block the caller of mark victim
*/
list_add_tail(&new_node->list, &new_oom_victims_list);
new_oom_victims_count++;
spin_unlock(&memhealth_spin_lock);
schedule_work(&memhealth_oom_work);
@@ -274,6 +277,7 @@ static int __init memhealthmod_start(void)
init_waitqueue_head(&memhealth_wq);
oom_victim_count = 0;
oom_victim_removed_count = 0;
new_oom_victims_count = 0;
ret = register_trace_mark_victim(mark_victim_probe, NULL);
if (ret) {